How to Track Users of Data Blocks?
First, deselect all.

You can then select all users of (eg) a mesh by right clicking that mesh in the outliner then clicking "select linked":



It should work with any linked item as materials, etc.

Then if you switch the outliner to "selected", it will list just all linked users.



bring now able to look at your file, it seams really weird...

you have 1 scene, and bender reports 1 object, but in the datablocks you have 188 objects... how many should it have in your goal?



and you "only" object has currently one of dozen other meshes...



could it be that this file has issues due to a "troubled" history..?

I tried appending only this object from your file (all 188 objects are still there) to a blank new file, and it works well now, and its mesh has only 1 real user, as it should have been...